According to the previous experience of the author, he affirms that the hyperergic factor plays an important role in the etiopathogenesis of atopic dermatitis and that the sensitization to foods present in 77% of the cases was the most important factor. This percentage can be seen to be potentiated by a determination of specific antibodies against the different foods by means of the passive hemagglutination tests which turned out to be positive in almost 70% of the cases. He admits of course, that psychological and all other already mentioned factors also play important accompanying roles. Lastly, he also considers that the racial factors played a very important part and that this disease affects especially those individuals with characteristics which Coca called "atopic".